Slide the panel against door jamb and make sure that top is fully extended, not tilted to one side.

Hand-tighten knobs by turning clockwise to lock the panel in place.
To permanently install, you may screw through the aluminum fins that protrude on the existing frame of your door. Drill through the fins into the panel. Install two screws in the top and two in the side by the bottom of the panel. Do not put any screws into the frame by the glass as breakage may occur.
Optional permanent placement for fixed panel sliding door. Remove screws that hold fixed glass panel in place and slide over. Insert the panel and re-fasten fixed glass panel.
Installing Security Lock (Optional)

(Placement Options-see above)
With sliding window in closed position, place lock in desired location and bolt in the retraced position, pointed toward the sliding glass door or stationary window rail. Leave approximately 1/8� clearance between bolt tip and aluminum rail.
Holding lock firmly in place, mark screw holes and center of bolt in rail of sliding door or stationary window.
Drill two 5/32� holes for mounting screws and a 3/8� hole for locking bolt. Caution: Do not drill into glass.
With sliding window in the closed position (with window insert installed), mark position for second set of holes.
Repeat above instructions Caution: Do not drill into glass.

Weather Stripping Placement

There are two pieces of weather stripping included in this package. A thin, wide draft-stopper with an adhesive strip that attaches to the back side of the sliding window that extends to the glass of the fixed window.
The other thin piece of weather stripping is the foam bumper, also with an adhesive backing, it attaches to the panel to provide a better seal when the sliding window closes against the panel.